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GB/T 1438.4-1996

d(h8)	Total length 200	Total length 250	Total length 315	Total length 400	Total length 500	Total length 630	Morse taper No.
	Flute length
7.50	110	160	225	--	--	--	1
8.00
8.50
9.00
9.50
10.00	--			310
11.00
12.00
13.00
14.00
15.00		--	215	300	400		2
16.00
17.00
18.00
19.00
20.00
21.00
22.00
23.00
24.00			--	275	375	505	3
25.00
28.00
30.00
32.00				250	350	480	4
35.00
38.00
40.00
42.00				--
45.00
48.00
50.00